METTLER TOLEDO LE3002E Precision Balance
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Shanghai, China |
| Model | LE3002E |
| Type | Precision Balance |
| Max Capacity | 3200.0 g |
| Readability | 0.01 g |
| Repeatability | 0.01 g |
| Calibration | External |
| Pan Size | 180.0 mm |
| Power Supply | AC |
Overview
The METTLER TOLEDO LE3002E Precision Balance is an entry-level analytical-grade instrument engineered for reliable mass measurement in routine laboratory, educational, and quality control environments. Based on electromagnetic force compensation (EMFC) transduction technology, the LE3002E delivers stable, drift-compensated readings with high reproducibility under standard ambient conditions (20–25 °C, <70% RH). Designed as part of METTLER TOLEDO’s LE series—targeted at cost-conscious yet performance-aware users—the LE3002E maintains core metrological integrity while optimizing operational simplicity and long-term serviceability. Its 3200.0 g maximum capacity and 0.01 g readability make it suitable for applications requiring sub-centigram resolution without the complexity or cost of higher-tier analytical balances. The balance complies with international weighing standards including OIML R76 and ISO 9001 requirements for measurement traceability and process control.
Key Features
- Electromagnetic force compensation (EMFC) sensor architecture ensuring consistent linearity and minimal hysteresis across the full weighing range.
- Robust aluminum die-cast housing with integrated draft shield mount points for optional enclosure integration in semi-controlled environments.
- Large 180.0 mm stainless-steel weighing pan optimized for stability with irregular or bulky samples up to 3200.0 g.
- External calibration capability using certified Class M2 or better weights—fully compliant with ISO/IEC 17025 calibration documentation protocols.
- Backlit LCD display with intuitive icon-driven interface; supports unit switching (g, mg, oz, ct, etc.) and tare functionality with zero-tracking mode.
- AC-powered operation with internal voltage regulation—no battery dependency or associated drift from power fluctuations.
- RS232 interface standard for direct data transfer to PCs, LIMS, or statistical process control (SPC) software; compatible with METTLER TOLEDO LabX Lite configuration tools.
Sample Compatibility & Compliance
The LE3002E accommodates a broad spectrum of sample types—including powders, granules, liquids in containers, solid components, and packaged goods—within its mechanical and environmental operating envelope. Its open-frame design allows straightforward placement and retrieval, while the large pan surface minimizes edge-loading errors during manual handling. The balance meets general-purpose regulatory expectations for non-critical weighing tasks in GxP-aligned facilities when used within defined SOPs. While not pre-configured for FDA 21 CFR Part 11 compliance (e.g., no built-in user authentication or electronic audit trail), it supports GLP/GMP workflows through external documentation of calibration, maintenance, and usage logs. It conforms to IEC 61000-4 electromagnetic compatibility standards and carries CE marking for use in the European Economic Area.
Software & Data Management
Data output is facilitated via a standardized RS232 serial port supporting ASCII-based transmission protocols. Users may configure output formatting—including timestamp, unit, net/gross/tare identifiers, and stability indicators—using terminal emulation software or third-party data acquisition platforms. For laboratories implementing digital quality systems, the LE3002E integrates with METTLER TOLEDO’s free LabX Lite software, enabling basic data capture, export to CSV/Excel, and customizable report templates. Though lacking embedded database functionality or multi-user role management, its deterministic communication protocol ensures repeatable data integrity for audit-ready recordkeeping when paired with validated PC-based acquisition routines.
Applications
- Raw material receipt inspection and batch verification in pharmaceutical excipient and dietary supplement manufacturing.
- Formulation support in R&D labs for compound preparation where ±0.01 g tolerance satisfies method requirements (e.g., buffer salt mixing, catalyst dosing).
- Teaching laboratories for introductory metrology courses, error analysis exercises, and density determination experiments.
- Quality assurance checkpoints in food processing—e.g., net weight verification of retail packaging prior to labeling.
- Inventory management and component counting by weight in electronics assembly and hardware distribution centers.
- Environmental testing labs performing soil moisture content analysis via gravimetric loss-on-drying protocols.
FAQ
What calibration weights are required for the LE3002E?
A certified external weight of 3200 g (Class M2 or better per OIML R111) is recommended for full-span verification; smaller weights (e.g., 100 g, 500 g) may be used for intermediate point checks.
Is the LE3002E suitable for use in a fume hood?
Yes—its sealed EMFC sensor and absence of moving mechanical linkages provide resistance to airflow-induced instability; however, draft shields are strongly advised for measurements below 0.1 g tolerance.
Does the balance support internal calibration or automatic adjustment?
No—the LE3002E requires manual external calibration only; it does not include motorized internal calibration mechanisms or temperature-triggered recalibration.
Can multiple LE3002E units be managed centrally?
Not natively—but when connected to a networked PC running LabX Lite or custom middleware, up to eight units may be polled sequentially via RS232 multiplexing or USB-to-serial adapters.
What is the warm-up time before achieving specified repeatability?
Minimum 30 minutes after power-on under stable ambient conditions; performance stabilization is confirmed when successive 10-second readings of a fixed load vary by ≤0.01 g.
